To the person who suggested an Impossible-tier badge for the game, here's the thing (I think): unless a game is freakishly long, I don't think simply beating it is worth that level of badge. Beating the final boss and/or the final bonus area on Epic difficulty, however, might just be worthy of such a badge.
Read my previous post first: I forgot that Tag: The Power of Paint was a thing. So maybe that's where Aperture Tag got its name (still no adhesion gel, though)...
To whomever commented that this takes the concept off of Aperture Tag, this game evidently came BEFORE that (but after Portal 2, of course)! I'd say it's the other way around, except... Idk if the devs of AT actually knew of this good ol' Flash game. If anyone knows more info, please follow up.
I only came here because Matt Roszak's latest game, Epic Battle Fantasy 5, seems to reference this game with an achievement of the same name (for upgrading a piece of equipment to max level). Worth it!
This is such a cool game! It really makes me want a boss editor to exist for this game--where you can create bosses (or use designs in the game) and make your own bullet patterns, while syncing it to any allowed song!
Player, I think there's a bug that causes the Duplicator to lag the game. I've been attempting a path where he's the only character allowed, and the lag's making it too difficult. I'm certain it's the character because I tried the Bunny on other levels and the game ran smoothly again.
To Skiznefrik: You should have at least one party member prepared for this with the plate I or a shield, or somehow defeat the bandit leader before he can cast Burst All.
Once when playing this on Epic, I distracted myself when the Mecha charged up, came back to the game and forgot about the beam cannon, the NEARLY lost to the attack because I didn't have either of my characters defend! Matt survived, however, and it took some extra time to re-stabilize, but I did beat that boss and was eventually able to finish the game again! :D
 "Epic Battle Fantasy 3"){kind=icon}
 "The Paint Gunner"){kind=icon}
 "Dino Run"){kind=icon}
 "Learn to Fly 3"){kind=icon}
 "UPGRADE COMPLETE!"){kind=icon}
 "Portal: The Flash Version"){kind=icon}
 "Papa Louie: When Pizzas Attack! - Kongregate Version"){kind=icon}
 "Bullet Audyssey"){kind=icon}
 "Run 3"){kind=icon}
 "Crystal Story II"){kind=icon}
 "Epic Battle Fantasy"){kind=icon}
 "Bloons Tower Defense 4"){kind=icon}